What makes you think this person is "entrusted to care for children"? The OP never said that. The OP said it was "someone employed by a public school system". And that's really the point: People read into things things that aren't necessarily there. Pointing fingers is very easy, but people should recognize the great responsibility they're taking on when they seek to place themselves in judgement over others. It isn't something that people should necessarily avoid "at all costs" but rather something that people should take very seriously, and acknowledge their own culpability should they end up fingering a good person unfairly. We all have our own biases, and surely someone who we feel has threatened us is someone we can reasonably be expected to be biased against. Keeping ourselves and our own away from such people is utterly reasonable. Going beyond that requires more careful consideration, but still should be undertaken when you feel that you're willing to take responsibility for your actions in doing so, fully cognizant of that responsibility.